Signal surge protector

Abstract

The utility model relates to a signal surge protector, and belongs to the field of surge protectors. The signal surge protector comprises a shell, a PCB, a sliding block and a rotating block, wherein the PCB, the sliding block and the rotating block are located in the shell. The PCB is provided with a power supply circuit comprising a first transient suppression diode, the sliding block is welded to the PCB through low-temperature soldering tin and serves as a normally-closed switch in the power supply circuit, and the rotating block is rotationally arranged on the shell and has the trend of pushing the sliding block to move. And when the first transient suppression diode is short-circuited, the first transient suppression diode is heated and the sliding block is separated from the PCB, so that the power supply circuit is disconnected. The signal surge protector provided by the utility model has a thermal protection function, and can generate heat when the first transient diode is short-circuited in the fault or failure state process of the power supply circuit, so that the low-temperature soldering tin at the welding position of the sliding plate and the PCB is melted, the power supply circuit is disconnected, the power supply circuit is permanently disconnected from a system, fire and combustion are avoided, and the service life of the power supply circuit is prolonged. And the path of the lightning stroke overvoltage feed-in system is thoroughly cut off, and the safety of electric equipment is effectively protected.

Description

Technical Field

[0001] The utility model belongs to the field of surge protectors, and in particular relates to a signal surge protector. Background Art

[0002] Surge protector, also called lightning arrester, is an electronic device that provides safety protection for various electronic equipment, instruments and meters, and communication lines. When a spike current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and shunt in a very short time, thereby preventing the surge from damaging other equipment in the circuit. Surge protectors play a vital role in line protection. Once damaged and not replaced in time, it will endanger the safe operation of electrical equipment. Therefore, maintenance personnel must be aware of the relevant situation of surge protectors in a timely manner.

[0003] When the existing surge protector fails or fails, a short circuit may occur, resulting in a fire, which poses a certain safety hazard. In addition, the existing surge protector is large in size and thickness, and is not suitable for environments with small installation areas. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a signal surge protector with a thermal protection function, which can withstand a certain degree of fault short-circuit current without burning or catching fire, fail safely, and can be permanently disconnected from the system in the event of a fault or failure to avoid short-circuit faults. In addition, the use of PCB boards for wiring can greatly reduce the thickness of the signal surge protector, making the signal surge protector thinner and more widely used.

[0005] The technical solution of the utility model is as follows:

[0006] The utility model provides a signal surge protector, comprising a shell and a PCB board, a slider and a rotating block located in the shell; the PCB board is provided with a power supply circuit including a first transient suppression diode, the slider is soldered to the PCB board by low-temperature solder and serves as a normally closed switch in the power supply circuit, the rotating block is rotatably arranged on the shell and has a tendency to push the slider to move; the first transient suppression diode generates heat when short-circuited and causes the slider to be separated from the PCB board, so that the power supply circuit is disconnected.

[0007] As an optional solution, the signal surge protector further includes a return spring, and the return spring enables the rotating block to have a tendency to rotate.

[0008] As an optional solution, the return spring is a tension spring, and two ends of the tension spring are respectively connected to the rotating block and the housing.

[0009] As an optional solution, the PCB board is further provided with a remote signaling circuit, the slider serves as a normally closed switch of the remote signaling circuit, and the remote signaling circuit is independently provided with the power supply circuit.

[0010] As an optional solution, the signal surge protector also includes two remote signaling ports, which include a terminal card, a spring sheet and a push block. The terminal card is fixed to the shell, the spring sheet is elastic and one end is adjacent to the end card, and the push block is slidably arranged in the shell and is used to push the spring sheet to deform.

[0011] As an optional solution, the shell is provided with a corresponding observation window and a first identification part, and the rotating block is provided with a second identification part; when the rotating block rotates, the second identification part can be opposite to the observation window.

[0012] As an optional solution, the first identification portion and the second identification portion have different colors.

[0013] As an optional solution, the power supply circuit includes an L1 line and an L2 line, a rectifier bridge is arranged between the L1 line and the L2 line, and the first transient suppression diode and the slider are arranged in the rectifier bridge.

[0014] As an optional solution, the power supply circuit further includes a PE line, and a gas discharge tube and a second transient suppression diode connected in parallel are respectively provided between the L1 line and the PE line, and between the L2 line and the PE line.

[0015] As an optional solution, resistors are provided on both the L1 line and the L2 line, and the resistors are located between the gas discharge tube and the second transient suppression diode.

[0016] As an optional solution, a plurality of steps are provided on both sides of the shell, and the connection ports of the power supply circuit are distributed in a stepped manner along the steps.

[0017] The beneficial effects of the utility model are:

[0018] The signal surge protector provided by the utility model has a thermal protection function. When the power supply circuit encounters a fault or failure state, the first transient diode can generate heat when it is short-circuited, thereby melting the low-temperature solder at the welding point of the slide plate and the PCB board, and the rotating block pushes the slider to separate from the power supply circuit, so that the power supply circuit is disconnected, thereby permanently disconnecting from the system to avoid fire and combustion, and completely disconnecting the path of lightning overvoltage feeding into the system, effectively protecting the safety of electrical equipment. In addition, the use of PCB boards for wiring can greatly reduce the thickness of the signal surge protector, making the signal surge protector thinner and more widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. As shown in the drawings, the above and other purposes, features and advantages of the utility model will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately scaled according to the actual size, and the focus is on showing the main purpose of the utility model.

[0020] Figure 1 A schematic diagram of the structure of the signal surge protector provided in the embodiment of the utility model Figure 1 ;

[0021] Figure 2 A schematic diagram of the structure of the signal surge protector provided in the embodiment of the utility model Figure 2 ;

[0022] Figure 3 Schematic diagram of the internal structure of the signal surge protector provided in the embodiment of the utility model Figure 1 ;

[0023] Figure 4 Schematic diagram of the internal structure of the signal surge protector provided in the embodiment of the utility model Figure 1 ;

[0024] Figure 5 for Figure 4 Another state diagram of ;

[0025] Figure 6 A circuit principle block diagram of a signal surge protector provided in an embodiment of the utility model.

[0026] Figure 7 for Figure 4 A partial enlarged schematic diagram of part A.

[0027] Icons: 10-signal surge protector; 110-housing; 111-step; 112-observation window; 113-first identification part; 120-wiring port; 121-remote signal port; 122-end card; 123-shrapnel; 124-push block; 130-PCB board; 134-first transient suppression diode; 135-air release tube; 136-second transient suppression diode; 137-resistance; 138-rectifier bridge; 140-slider; 141-rotating block; 142-second identification part; 143-reset spring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0032] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0033] Please refer to Figure 1 , Figure 2 As shown, an embodiment of the utility model provides a signal surge protector 10, which can provide safety protection for various electronic equipment, instruments and meters, and communication lines.

[0034] Please combine Figure 3-Figure 5 As shown, the signal surge protector 10 is mainly composed of a housing 110 , a PCB board 130 , a slider 140 and a rotating block 141 , wherein the PCB board 130 , the slider 140 and the rotating block 141 are all located in the housing 110 .

[0035] The structure of the housing 110 is not limited. In this embodiment, the housing 110 is made of non-metallic material, suitable for standard 35mm rail installation, and has a thickness of only 6mm. The housing 110 can be composed of two separable parts. The housing 110 has a receiving cavity, and the PCB board 130, the slider 140 and the rotating block 141 are all located in the receiving cavity.

[0036] The PCB board 130, also known as a printed circuit board or printed circuit board, is a support for electronic components and a carrier for electrical connection of electronic components, on which circuits can be printed. The connection between the PCB board 130 and the housing 110 is not limited, such as snap-on, welding, detachable connection, etc.

[0037] Please combine Figure 6 As shown, a power supply circuit and a remote signaling circuit are provided on the PCB board 130, wherein the remote signaling circuit and the power supply circuit are independently provided, that is, the two are not connected to each other, the power supply circuit can realize the protection function, and the remote signaling circuit can monitor and feedback the status of the signal surge protector 10, which is conducive to remote monitoring.

[0038] A first transient suppression diode 134 is arranged in the power supply circuit. Specifically, the power supply circuit can adopt but is not limited to the following scheme: the power supply circuit includes an L1 line, an L2 line and a PE line, and a rectifier bridge 138 is arranged between the L1 line and the L2 line. The rectifier bridge 138 can be a full bridge, including four diodes, and the first transient suppression diode 134 is arranged in the rectifier bridge 138.

[0039] An air discharge tube 135 is provided between the L1 line and the PE line, and between the L2 line and the PE line. The air discharge tube 135 has a large current-carrying capacity. When an overvoltage occurs, a large amount of current and charge are quickly discharged to the ground through the air discharge tube 135; after the overvoltage disappears, the air discharge tube 135 quickly returns to its original insulation state, and the circuit returns to normal. A second transient suppression diode 136 is also provided between the L1 line and the PE line, and between the L2 line and the PE line. The second transient suppression diode 136 is connected in parallel with the air discharge tube 135, and also serves to discharge overcurrent, forming a two-way discharge with the air discharge tube 135 to achieve two-level protection; and by selecting air discharge tubes 135 and second transient suppression diodes 136 with different parameters for use in conjunction, the protection capability of the signal surge protector 10 can be enhanced. A resistor 137 is provided on both the L1 line and the L2 line. The resistor 137 is located between the air discharge tube 135 and the second transient suppression diode 136. The resistance value of the resistor 137 can be set as needed, which will not be repeated here. Figure 6 , the L1 line is L1, the L2 line is L2, the PE line is PE, the first transient suppression diode 134 is VD1, the slider 140 is NC, the second transient suppression diode 136 is VD2 and VD3, the air release tube 135 is V1 and V2, the resistor 137 is R1 and R2, and the four diodes of the rectifier bridge 138 are VD4, VD5, VD6 and VD7.

[0040] A plurality of steps 111 are provided on both sides of the housing 110, and the power supply circuit has a plurality of connection ports 120, for example, Figure 6In the embodiment, the L1 line has an IN1 connection port and an OUT1 connection port, the L2 line has an IN2 connection port and an OUT2 connection port, and the PE line has a PE1 connection port. The structure of the connection port 120 can refer to the prior art, such as a screw crimping structure, etc. The connection port 120 is arranged on the step 111, and the connection ports 120 on each side of the housing 110 are distributed in a stepped manner. In this way, the rear end of the housing 110 can be made smaller and the structure more compact.

[0041] In addition, the signal surge protector 10 further includes two remote signal ports 121, which are AML11 and AML12, respectively. The remote signal ports 121 can be located on one side of the housing 110. Figure 7 As shown, the remote signal port 121 includes a terminal card 122, a spring piece 123 and a push block 124. The terminal card 122 is fixed to the housing 110. One side of the terminal card 122 can be provided with a plurality of strip grooves. The spring piece 123 is elastic and one end is adjacent to the terminal card 122. The push block 124 is slidably provided on the housing 110 and is used to push the spring piece 123 to deform. During installation, the remote signal line is inserted into the remote signal port 121, and the terminal card 122 and the spring piece 123 clamp and fix the remote signal line; when the remote signal line needs to be taken out, the push block 124 is pressed to deform the spring piece 123 and move away from the terminal card 122.

[0042] The slider 140 is conductive and can be used as a switch in the power supply circuit, and is connected to the first transient suppression diode 134, and the two are adjacent to each other; when the signal surge protector 10 works normally, the slider 140 and the PCB board 130 are fixed by low-temperature soldering. At this time, the slider 140 serves as a normally closed switch in the power supply circuit, and the power supply circuit is electrically conductive; when the signal surge protector 10 fails or fails, the first transient suppression diode 134 generates heat, and the heat causes the low-temperature solder between the slider 140 and the PCB board 130 to melt, and the slider 140 is pushed out of the original position, the switch is disconnected, and the power supply circuit is open, which can avoid the risk of fire and combustion, and completely disconnect the path of lightning overvoltage feeding into the system, effectively protecting the safety of electrical equipment.

[0043] In addition, when the signal surge protector 10 is working normally, the slider 140 is also used as a normally closed switch of the remote signaling circuit. When the slider 140 is out of position, the remote signaling circuit can be disconnected, thereby playing a monitoring role. The status of the signal surge protector 10 can be fed back to the remote side, so that the signal surge protector 10 has a remote signaling function, which is conducive to remote monitoring and convenient for timely maintenance and replacement.

[0044] The rotating block 141 is rotatably disposed in the housing 110, and the rotating block 141 has a tendency to push the slider 140 to move. When the low-temperature solder between the slider 140 and the PCB board 130 melts, the rotating block 141 drives the slider 140 to leave its original position. Specifically, the rotating block 141 has elastic force and is blocked by the slider 140. When the low-temperature solder between the slider 140 and the PCB board 130 is not melted, the rotating block 141 abuts against the slider 140. At this time, the rotating block 141 applies a certain force to the slider 140, but the force is less than the friction between the slider 140 and the PCB board, and the rotating block 141 cannot push the slider 140 out of its original position; when the solder between the slider 140 and the PCB board 130 melts, the rotating block 141 resets under the action of its own elastic force, thereby pushing the slider 140 out of its original position, and completely disconnecting the power supply circuit and the remote signaling circuit.

[0045] The structure that makes the rotating block 141 have a tendency to rotate is not limited. For example, the rotating block 141 is made of a material that can undergo elastic deformation, such as a metal sheet, rubber, etc., and the rotating block 141 is actively deformed when installed, and the rotating block 141 has a tendency to return to its original state. When the resistance applied by the slider 140 to the rotating block 141 disappears, the rotating block 141 can be restored and push the slider 140 to slide. In this embodiment, the signal surge protector 10 also includes a reset spring 143, and the reset spring 143 makes the rotating block 141 have a tendency to rotate. The reset spring 143 can be a tension spring, a compression spring or a torsion spring, etc. The installation method of the reset spring 143 can refer to the prior art. Taking the tension spring as an example, the two ends of the tension spring are respectively connected to the rotating block 141 and the housing 110. The tension spring is stretched to a certain extent. When the external force disappears, the tension spring shortens.

[0046] In addition, the housing 110 may also be provided with an observation window 112, which may be a through hole or a transparent material. A first identification portion 113 is provided in the housing 110, and the first identification portion 113 corresponds to the observation window 112, that is, when there is no other component blocking it, the staff can see the first identification portion 113 from the observation window 112. A second identification portion 142 is provided on the rotating block 141, and the position of the second identification portion 142 also corresponds to the observation window 112, that is, when the rotating block 141 rotates, the second identification portion 142 is opposite to the observation window 112, and the second identification portion 142 can be observed from the observation window 112. Specifically, when the slider 140 is not separated from the PCB board 130, the staff can see the first identification portion 113 through the observation window 112; when the slider 140 is separated from the PCB board 130 and the rotating block 141 rotates, the staff can see the second identification portion 142 through the observation window 112. In order to enable the staff to quickly distinguish the first identification part 113 and the second identification part 142, and thus accurately determine the status of the signal surge protector 10, marks or shapes that are easy to identify can be provided on the first identification part 113 and the second identification part 142. For example, the first identification part 113 and the second identification part 142 have different colors, the first identification part 113 is green, the second identification part 142 is red, etc.

[0047] The working method of the signal surge protector 10 provided in this embodiment is as follows:

[0048] Install the signal surge protector 10 at the designated location;

[0049] When the signal surge protector 10 works normally, the slider 140 is welded and fixed to the PCB board 130, the rotating block 141 abuts against the slider 140, the reset spring 143 is in a stretched state, the power supply circuit and the remote signaling circuit work normally, and can protect electronic equipment, instruments, etc.;

[0050] When the signal surge protector 10 fails or fails, the first transient suppression diode 134 between the L1 line and the L2 line generates heat, and the heat generated melts the low-temperature solder at the welding point of the slider 140 and the PCB board 130, that is, the slider 140 is separated from the PCB board 130. At this time, the rotating block 141 rotates under the action of the reset spring 143, and the rotating block 141 pushes the slider 140 to slide, so that the slider 140 is separated from the power supply circuit and the remote signaling circuit, and the power supply circuit and the remote signaling circuit are disconnected; when the power supply circuit is disconnected, the signal surge protector 10 will not have the risk of fire and combustion, and the power supply circuit is open, completely disconnecting the path of the lightning overvoltage feeding into the system, protecting the safety of electrical equipment; when the remote signaling circuit is disconnected, the signal surge protector 10 changes from a low level state to a high level state, and feeds back the change to the background equipment, so that the staff can understand the status of the signal surge protector 10 in time;

[0051] In addition, on-site staff can check the color through the observation window 112 to determine the status of the signal surge protector 10. For example, green represents that the signal surge protector 10 is working properly, and red represents that the signal surge protector 10 is faulty or ineffective.

[0052] The above steps can be increased, decreased, modified, and the order can be adjusted as needed. For example, if the signal surge protector 10 does not include the observation window 112, the first identification part 113 and the second identification part 142, the corresponding steps can be cancelled, or if the reset spring 143 is a torsion spring, the corresponding steps can be adaptively adjusted.

[0053] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A signal surge protector, characterized in that: The invention comprises a shell, a PCB board, a slider and a rotating block located in the shell; the PCB board is provided with a power supply circuit including a first transient suppression diode; the slider is soldered to the PCB board by low-temperature solder and serves as a normally closed switch in the power supply circuit; the rotating block is rotatably arranged in the shell and has a tendency to push the slider to move; when the first transient suppression diode is short-circuited, it generates heat and causes the slider to be separated from the PCB board, so that the power supply circuit is disconnected.

2. The signal surge protector according to claim 1, characterized in that: The signal surge protector further comprises a return spring, and the return spring enables the rotating block to have a tendency to rotate.

3. The signal surge protector according to claim 2, characterized in that: The return spring is a tension spring, and two ends of the tension spring are respectively connected to the rotating block and the housing.

4. The signal surge protector according to claim 1, characterized in that: The PCB board is also provided with a remote signaling circuit, the slider serves as a normally closed switch of the remote signaling circuit, and the remote signaling circuit is independently provided with the power supply circuit.

5. The signal surge protector according to claim 4, characterized in that: The signal surge protector also includes two remote signal ports, which include a terminal card, a spring and a push block. The terminal card is fixed to the shell, the spring is elastic and one end is adjacent to the terminal card, and the push block is slidably arranged in the shell and is used to push the spring to deform.

6. The signal surge protector according to claim 1, characterized in that: The shell is correspondingly provided with an observation window and a first identification part, and the rotating block is provided with a second identification part; when the rotating block rotates, the second identification part can be made to face the observation window.

7. The signal surge protector according to claim 6, characterized in that: The first identification portion and the second identification portion have different colors.

8. The signal surge protector according to claim 1, characterized in that: The power supply circuit includes an L1 line and an L2 line, a rectifier bridge is arranged between the L1 line and the L2 line, and the first transient suppression diode and the slider are arranged in the rectifier bridge.

9. The signal surge protector according to claim 8, characterized in that: The power supply circuit further includes a PE line, and a gas discharge tube and a second transient suppression diode connected in parallel are respectively arranged between the L1 line and the PE line, and between the L2 line and the PE line.

10. The signal surge protector according to claim 1, characterized in that: A plurality of steps are arranged on both sides of the shell, and the connection ports of the power supply circuit are distributed in a stepped manner along the steps.

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